North Pacific storm

31°48.7′N 153°44.2′W

Waves left about 1 Oct 12:25Z, ± 2 h

Placed by 5 buoys, whose own placements lie within 246 nmi of it

Its swell was last measured at 46061 (Seal Rocks, AK) on 10 Oct 01:20Z; the replay ends there.

Each buoy places the storm from how its swell's period shortened as it arrived: the longest waves travel fastest. Fronts are drawn at deep-water group speeds along great circles, and stop at land. How it is worked out